Download Lookout Invasive New Plants SE Wisconsin

KEEP A LOOKOUT
for NEW INVASIVE PLANTS
in Southeastern Wisconsin!
These plants are not yet known or are brand new in our region, but
have populations not far away. Control (or eradication) of ANY
populations of these NEW invasives can prevent them from getting
a foothold in our region, and we need to be vigilant NOW to find,
report, and eradicate them.
TO REPORT, visit: sewisc.org/invasives or
dnr.wi.gov/topic/Invasives/report.html, or call:
608.264.8590, or email: [email protected].
FOR CONTROL and management information, visit:
sewisc.org, or dnr.wi.gov/topic/invasives/control.html.
Bodner (3)
FOR ID and distribution, visit: botany.wisc.edu/wisflora,
or wisplants.uwsp.edu, or weedid.wisc.edu.
Czarapata
Mehrhoff
Bodner
Miller
Czarapata Mehrhoff
Bodner
ACTIONS:
1. Monitor and report ANY populations in our region.
2. Control (or eradicate) ANY populations in our region.
Climbing vine 6' to 30' long, forming
dense, sprawling mats on the ground or
in trees. Hollow stems up to 2" thick
are reddish-light brown eventually
becoming tan and fissured with peeling
bark. Paired, oval leaves have
whitish-green undersides. Tubular
flowers are fragrant, showy, and white,
cream, or pink. Blooms April – June
and produces purplish-black berries.
Annual trailing herbaceous vine that
can grow up to 6" per day. Leaves are
triangular, 1" to 3", alternate, with small
barbs on the underside. Reddish stems
have downward pointing barbs and
have cup-shaped leaf structures from
which small, white flowers emerge.
Blooms all summer, produces metallic
blue fruits. Threatens forest edges,
wetlands, stream banks, forest openings.
Perennial, deciduous, semi-woody
climbing vine, to 35' to 100' long.
Forms dense, tangled mats over trees.
Yellow-green younger stems with
hairs; eventually ropelike, gray and
hairless. Leaves are alternate with
three leaflets; middle leaflet stalked.
Purple flowers in slender racemes
2" to 12" long. Blooms June – Sept.
Threatens stream banks, mesic forests.
Old
WDNR
Mehrhoff
Czarapata
Samanek
Casagrande
Judziewicz
(Peuraria lobata)
Deciduous woody vine 10' to 15' tall.
Bark is whitish-gray, has prominent
lenticels and does not peel. Leaves are
alternate, have a heart-shaped base and
3 to 5 deeply divided finely toothed
lobes. Blooms June – August with
greenish-white flowers. Fruits range
from yellow to purple to blue in color.
Can be confused with the native grape
(Vitis). Threatens forest edges.
Kohout
Kudzu
(Polygonum perfoliatum)
Tokarska-Guzik
Mile-a-Minute Vine
(Lonicera japonica)
Renz
Japanese Honeysuckle
(Ampelopsis brevipedunculata)
Czarapata (2)
Porcelainberry
Black Swallow-Wort
Hill Mustard
Flowering Rush
Hairy Willow Herb
(Vincetoxicum nigrum)
(Bunias orientalis)
(Butomus umbellatus)
(Epilobium hirsutum)
Herbaceous, perennial, climbing vine
3' to 6' tall creating dense, tangled
thickets. Leaves are opposite, 2" to 5"
long, dark green, with a smooth surface
and edge. Flowers are maroon with 5
triangular petals covered in soft white
hairs. Seeds and seedpods resemble
milkweed with long silky hairs in a
tapering slender pod. Threatens
woodland edges, forests and prairies.
Upright biennial/perennial forb that
branches near the top and grows
10" to 45" tall. Stems are covered with
warty bumps and hairs. Basal leaves
have sharply pointed lobes, are 12"
long and slightly hairy. Upper leaves
are smaller. Flowers are yellow, round,
4-parted and are in several stalked,
loose clusters. Threatens prairies and
savannas.
Aquatic perennial herb with emergent
and submersed leaves, spread by
rhizomes. Emergent leaves are stiff,
narrow, sedge-like and can rise up to 3'.
Showy flowers are 3-parted, pink, white
or purple, in a loose umbel. Blooms late
summer to early fall. Leaves can be
confused with bur-reed, a native plant,
but bur-reed has v-shaped leaves.
Threatens lakes, ponds and wetlands.
Perennial 3' to 6' tall, covered with soft,
fine hairs. Leaves are opposite, toothed
along the edges, and are longer than
wide. Pinkish-purple flowers emerge
from the leaf axils and have 4 petals
with distinct notched tips. Blooms
July – August. Threatens wetlands,
sedge meadows, mesic prairies and
stream banks.
Czarapata
Garske
Garske
Denholm
Black
Judziewicz
Mehrhoff (2)
Czarapata
Old
Cypress Spurge
Giant Hogweed
Everlasting Pea
(Euphorbia cyparissias)
(Heracleum mantegazzianum)
(Lathyrus sylvestris)
(Myosotis scorpioides)
Perennial herbaceous to semi-woody
plant, 8" to 14" tall. Rhizomes form
colonies. Flowers are greenish-yellow,
no petals or sepals (upper leaves are
petal-like), forming branched umbels.
Blooms May – August. Linear leaves
are numerous, bright green, alternate
and in whorls. Leaves below the umbel
have heart-shaped bases.
Biennial/perennial forb 8' to 15' tall.
First year rosettes are bush-like with
compound leaves 1' to 5' wide, deeply
notched and pointed. Second year
plants produce white flowers in broad,
flat-topped umbels. Hollow stalks are
2" to 4" wide covered with coarse white
hairs and purplish mottling. Blooms
May – July. Caution! Plant sap plus sun
exposure causes painful skin blistering.
Climbs through the use of tendrils and
can attain heights of 5' to 7' if support is
available. Forms a dense mat of
vegetation. Winged stems and petioles.
Leaf has two long, narrow leaflets with
parallel veins, tendril extending from
the juncture. Deep-pink flowers. 2" long
seed pods contain hard round seed.
Perennial forb 4" to 24" tall with hairy
stems and creeping roots. Leaves are
alternate, stalkless and hairy. Flowers
arise in a branched cluster, have 5 blue
petals and a distinct yellow center.
Blooms May – Sept and produces
smooth, shiny nutlets on spreading
stalks. Threatens stream banks, mesic
forests, wetlands and marshes.
Evans
Mehrhoff
Mehrhoff
Freckmann
Czarapata
Wallace
Garske
Common Forget-Me-Not
Japanese Plume Grass
Carolina Fanwort
Hydrilla
(Microstegium vimineum)
(Miscanthus sacchariflorus)
(Cabomba caroliniana)
(Hydrilla verticillata)
Annual grass, usually sprawls out
1' to 5', spread by seeds or rooting nodes
along the stems. Leaves are pale green,
alternate, with pale, silvery hairs along
the midrib. Branched stalks resemble
bamboo. Produces flower spikes 1" to
3" long. Blooms in Sept. Threatens
stream banks, floodplains, wetlands,
mesic forest, and mesic prairies.
Grass 6' to 8' high, spread by rhizomes.
Leaves are green, 10" to 25" long and
¼" to 1¼" wide with a prominent
midrib. Flowers are very soft and
silvery white and have no awns.
Blooms August – September.
Threatens woodlands and prairies.
Submersed aquatic perennial, spreads
by seeds or rhizomes, generally rooted
in the substrate. Stems are green to
reddish-brown. Submersed leaves are
whorled; floating leaves are alternate
and diamond-shaped. Small, white, pink
or purple flowers grow from stem tips
and float on the surface. Can be
confused with water milfoils, water
buttercup and Beck’s water marigold.
Submersed aquatic plant, grows rapidly
in shallow or deep water. Leaves are
whorled in groups of 4 to 8, triangular,
green, yellow, or brown. Leaf edges are
serrated with barbs along the midrib.
Branched stems grow horizontally
creating a dense mat on the water
surface. Small tubers at the rooted
base of the plant. Threatens lakes,
ponds and streams.
Mehrhoff
Cappaert
Japanese Stilt Grass
European Frog-Bit
Yellow Floating Heart
(Hydrocharis morsus-ranae)
(Nymphoides peltata)
Free-floating aquatic plant, resembles a
miniature water lily but much smaller.
Smooth, thick leaves are 1" to 2" wide,
spongy with purplish-red bottoms.
White flowers have 3 petals and occur
singly. Roots are 3" to 8" long and
dangle from bottom of leaves. Tangled
roots and runners create dense mats.
Threatens shallow waters such as
ponds, marshes and lake edges.
Just recently found in Southeastern
Wisconsin. Leaves are silver-dollar
sized heart-shaped to circular shiny
green; often wavy along the edges and
purplish underneath. Flowers yellow,
1" to 2", 5-petaled, on separate stalk
several inches above the water line.
Aggressive, fast growing, can form
thick floating mats that can displace
native vegetation.
Restricted Species
Prohibited Species
Species without a map are not regulated
by NR 40 (WI’s Invasive Species Rule)
Tree
Forb
Shrub
Grass
Vine
For those occurring in wetlands:
SOMEWHAT WET
Floodplain forests,
seasonally flooded basins
WET
Wet meadows, shrub
swamps, wooded swamps
VERY WET
Deep marsh, shallow marsh
AQUATIC
Full photo citations available at: sewisc.org
This institution is an equal opportunity provider.
September 2013